/**
 * 
 */
package trungsi.gea.photos.jdo;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * @author trungsi
 *
 */
public class OpenPersistenceManagerInViewFilter implements Filter {

	private PersistenceManagerHolder pmHolder;
	
	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		pmHolder.open();
		try {
			arg2.doFilter(arg0, arg1);
		} finally {
			pmHolder.close();
		}
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		pmHolder = new PersistenceManagerHolder();
	}

}
